Advani, who met Mukherjee in the Parliament, told him about the "atrocities" meted out to the activists of the Bhartiya Janata Yuva Morcha (BJYM).

Sources said Advani, without naming Chidambaram, told Mukherjee that such action could not have been taken without orders from the higher ups in the Home Ministry. Delhi police comes directly under Chidambaram.

Advani had visited the injured in hospital on Tuesday and soon thereafter demanded an inquiry into the matter. However, the party has now upped its demand and wants Chidambaram's resignation.

The senior BJP leader also told Mukherjee that there were reports of Chidambaram telling a section of the media that he did not want another "Ayodhya-like incident" and hence the lathicharge on activists.

Advani told Mukherjee that even handicapped activists were not spared by the police during the lathicharge.

The youth wing activists had taken the metro train to the Parliament and then walked upto Vijay Chowk in small groups, taking the police by surprise.

Senior BJP leader M Venkaiah Naidu demanded the resignation of Chidambaram on the issue of lathicharge on its party activists.

"This is not the first time. They did the same thing by attacking Baba Ramdev's camp and his followers. The police behaviour is atrocious and condemnable. we will continue to agitate in the House," he said.